Go language types include Boolean types, integer types, floating point types, string types, array types, slice types, structure types, dictionary types, function types, etc. Detailed introduction: 1. The Boolean type has only two values, namely true and false; 2. Integer types include int8, int16, int32, int64 and the corresponding unsigned integer types uint8, uint16, uint32, uint64. The specific sizes of these integer types Depends on the number of digits in the system; 3. Floating point number type, etc.
The operating environment of this tutorial: Windows 10 system, go1.20.1 version, Dell G3 computer.
Go language is a statically typed programming language that provides some basic data types and composite data types. The following will introduce the commonly used data types in Go language.
1. Boolean type (bool): The Boolean type has only two values, namely true and false. Boolean types are very common in conditional judgments and logical operations.
2. Integer types: Go language provides a variety of integer types, including int8, int16, int32, int64 and the corresponding unsigned integer types uint8, uint16, uint32, uint64. The exact size of these integer types depends on the number of bits in the system.
3. Floating point number types: Go language provides two floating point number types, namely float32 and float64. By default, the Go language uses float64 as the default type of floating point numbers.
4. String type: The string type is composed of a string of characters, enclosed in double quotes or backticks. String types are very common in text processing and logging.
5. Array type: Array is a fixed-length, fixed-type data structure. The array declaration method in Go language is var arr [n]Type, where n represents the length of the array and Type represents the type of the array element.
6. Slice type (slice): A slice is an abstraction of an array, which can grow and shrink dynamically. The declaration method of slice is var slice []Type, where Type represents the type of slice element.
7. Structure type (struct): A structure is a data structure composed of multiple fields and can be used to represent complex data types. The structure is declared as type StructName struct{ field1 Type1, field2 Type2, ... }.
8. Dictionary type (map): A dictionary is an unordered collection of key-value pairs. The keys and values can be of any type. The dictionary is declared as var m map[KeyType]ValueType, where KeyType represents the type of key and ValueType represents the type of value.
9. Function type: Functions are first-class citizens in the Go language and can be used as parameters, return values and variables. The type representation of the function is func(Type1, Type2, ...) Type.
In addition to the above commonly used types, the Go language also provides advanced data types such as pointer types, interface types, and channel types, as well as custom types. These types give programmers greater flexibility and expression capabilities, making the Go language suitable for a variety of application scenarios. By using these types appropriately, we can develop reliable and high-performance Go language programs more efficiently.
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